Polishing and grinding machine



Z9 E923, y

C. L. HAWES. PoLlsHmG AND GRxNDiNG Mmmm 2 SHEETS-SHEET Patented dan. 2, i923.,

NETE@ STATS mettait@ CHARLIE L. HAWES, OF ASHTABULA, OHIO.

POLISHING AND GRINDING MACHINE.

Application 1ed November 26, 1919. Serial No. 340,709.v

To all whom it may concern.'

Be it known that I, CHARLIE L. HAwEs, a citizen of the United States, and a resident of Ashtabula, county of Ashtabula, vand State of Ohio, have inventeda new and useful improvement in Polishingland Grindingll/lachines, of which the following is a specification, the principle of the invention being herein explained and the hest mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

The object of the presentv invention is to provide a polishing or grinding machine of the dual opposed wheel type, which will be capable of automatically operating on articles such as axes, hatchets, and 'the like. lFor operation on articles of this character, the grinding or polishing wheels require,

to be more or less closely positioned as different portions of the article are presented. Means on the order of a template are accordingly provided, whereby the position of the two wheels is. simultaneously automatically controlled so as to cause them to grind in the desired plane or planes, and thus conform with the surface of the articler being finished. ln the case of an ax or hatchet, the two surfaces of the article are symn'ietrical, and the adjustment of the two wheels accordingly is in .unison but in opposite. direction.` This, however, ,need not necessarily be the case, and furthermore, by an adaptation, articles of circular crosssect-ion, suoli as certain forms of hammerheads, for example, which constitute frustra of cones or pyramids, may be ground with equal facility.

To-the accomplishment of the foregoing and related ends, the invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims, the annexethdrawings and the following description setting forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but several of the various mechanical forms in which the principle of the invention may be used.

ln said annexed drawings i Fig. l is a side elevation of a polishing or grinding machine embodying my present improvement-s as arranged specifically for grinding ari-heads;v Fig. 2. is a front elevation of the saine; Fig. B is a transverse secfion of the machine taken on the plane indicated by the line 3f-3, Fig. 1.; Fig. 4. is a central longitudinal section thereof, taken on the plane indicated by the line 1--.4, Fig. 2; Fig. 5 is a plan view of a portion of the machine Fig. 6 is a diagrammatic representation lof a train of gearing that forms o. a feature of 4the machine; and Fig. 7 is a sideelevation of a detail showing a modification m construction.

The various operative parts of the machine, it will be seen, are supported on a 'self-contained electric motor 5, the spindle of which carries on its rear end a belt pulley G; while transversely adjustably mounted on the upper approximately horizontal face of each arm is a housing 7 wherein is journaled the spindle 8 of\ one of the polishing or grinding wheels 9. Such wheel is mounted on the front vend ofits spindle, the rear end being provided with a pulley l0 aligned with pulley 6 and connected to be driven from the latter by the belt 1l.

The particular construction of the wheels 9 is a matter of indifference so far as the essential features of the invention are concerned, but for grinding articles such as those hereinbefore referred to, such wheels will ordinarily be of emery or like solid abrasive material, while for butling or polishing, they will be of any material usually employed in this connection.

The motors 5, by reason of their weight and disposition with respect to the `pivotal axes 3 of the frame 4 to which they are attached, will tend to swing the-lower ends of such frames inwardly, and such inward movement of the lower ends of the. arms. however produced, will obviously swing the spindles A8, and thus the wheels 9, outwardly or apart from each other. In .order to overcome the efl'eot of the weight of the motors and normally to cause the wheels to tend to move in a contrary direction, i. e. towards each other, a rock shaft l5 is journaled, preferably centrally, in base l, and proioo to said shaft l at right-anglesvtogthe arms 16 is provided with a counter-weight 19 that is heavy enough to overcome the at'ore'i f said etliect of the motors and so actually tend to foro-e the lower ends of the arms 4 apart and move the wheels 9 towards each other, vsuch counter-weight'being adjustable to vary pressurel Still another arm v20 is @technicit @hat needing' in 1 irection opposite to that of armv 18,'and is conneeadjby ineens of a link 2i with afoot 15 lever`22,lthe result being that'by`depressing such leverthe yshaft may be rocked in a direction`tomove the lower ends "of the i arms 4 inwardly, and thus lseparate the wheels9, to permit chanring the work. Outward movement of the ower larm-ends under the influence of counter-weight 19` is limited means of adjustable vstopsv 23 whereby the 'wheels may be allowed l'to apf p" cach reach other as closely as desired without actually Contacting f t The lholder fon the"\vorl z, which consists as atoiesaid'of vair-heads in the case of the specific machine" hand, together with associated operating mechanism, vis best shown IlvFigs.' 3,y 4 and 5. `The mainy element of such holder is a bar 25 thatis supported so 'asta be both vertically' and longitudinallyl v movable' in a fixed plane passingy between the inwardly' directed faces' ofthev two wheels9. Such bar25, in otherwords, 'is disposed parallel with the axes of the spin'- dles v8,".and,inorder that it may be capable of movement in the `fashion justldescribed, itis supported'by means ofjparallel links `2,6 from the approximately horizontal arms of corresponding bellfcranlrs 27 which are pivotally'mounted about `aires 28 in a suit# able vframework 29j on the top ot base 1. rlfhe depending arms of bell cranks 27 are connected'by meansot Ianfadjustable link or rodi-5 0 so'that the two cranks will move in unison to lelevateand depressthe ba125, such movement beingderived through the medium of a Connecting rod Bl'attached at its upper end to one of said bell cranks and at its lower r-end eccentrically attached to a rotatable member 32.` y l Pivotally mounted Vupon thesaine axis 28 as one ofthe bell cranks v27, is another bell crank35 .having its oney arm directed par tially vertically, and connected by means ot a horizontal lever Bwvith the depending rear end 37 of bar 25. `They'other arm of said bell crank 35 is connected by means of a link 38` with a rotatable'member 39 'coaxial with member 32. The effect of oscillation of bell crank 35 will obviously be to impart a toanddro motion to bar 25 longitudinally of its aXis, and that irrespective et whether said bar is being simultaneously Q iff. j l 1,440,336`

raised or lowered, due the `bell cranks 27.

VThe two members 32 and 39, from which motion is respectively communicated to the pair ot bell cranks 27 that thus raise and blower bar 25, and to the bell crank 35 that -tothe oscillation of such second;shattcarrying'a smallgearfl v that engagesv member32, vand a larger `gear 44 that engages member 89, both said members being provided with appropriate gear teeth, inefe'ct constituting-'vot' them gears themselves. These two members arel conveniently assembled and held iacefto tace in a suitable housing 46 'attachedzto' the rear tace of base 1, asv shown in ligs. 1 and 4.

Fixedly attached to the respecti'vehousings 7 are inwardly directed guides 5 0, between'which are held 4plates 51,whose inwardly directed faces are of segmental form. 'lhese'plates'lv are oscillatorily attached at their lower ends to ythe guides 50, about axes 52, and are angularly adjustable. about suchl axis by means or' screws 53 provided with suitable hand-wheels54 tor convenience of operation. Such plates 5l are designed to simultaneously contact with opposite faces of a master form or template A' suitably secured to the bar 25, and, as such bar risesand falls', to ycorrespondingly force "said plates apart or allow them to approach each other, it 'being understood that, underV the action of counter-weight 19, theupper ends of the arms 4 normally tend to swingtowards each other and similarlyto move the parts mounted thereon, including housings 7 and these plates 51. The latterv will be adjusted to bring their inwardly directed edges into positionv corresponding with the juxtaposed roo lio

faces ofwheels l9,* so that, asthel plates .are

this case an aX-head (t, a suitable member 55 is detachably secured to the forward end or' bar 25, as by means of bolts. rl'he'h'eads .a are successively slipped onto such projecting member, and, att-er grinding, removed vtherefrom by the operator.

The general y'operation oi the machine naaoee should-be readily evident. Assuming it is desired to place an aX-head on member 55, the wheels 9 are separated by depressing toot lever 22.- The member 25 should be in its lowermostposition when this is done, and approximately midway between the limits of its endwisemovement. li'then, thel article a be located centrally with respect tothe'grinding faces of wheels 9, when the latter `are allowed to contact therewith by releasing pedal 22, the position of parts will be substantially as illustrated in Figs. 2 and` 4. The remainder of the operation is automatic; in other words, the article is reciprocated back and forth across the faces of the wheels at the same time that it is elevated. In the course of such movement of the article the wheels follow its contour, as they are at all times guided in their relative position by the plates 51 which Contact with the master'torm or template A. rThe operation is complete when the lower cut ting edge of the article is nally raised out otscontact with the wheels.

A machine of the foregoing construction can be readily adapted to grind a plurality of tapering faces forming a trustum of a pyramid or a conical tace forming the trustum of acone, such as found in certain styles of hammers and sledges, by providing means tor rotating the article being operated upon about a vertical axis. ln Fig. 7, l show asimple form of holder 57 intended to replace member v on the Yforward end` ot bar 9,5, such holder comprising a rotatable element on which the hammer-head or similar article is mounted in place ot a straight projection 55. A. bracket 58 serves thus rotatably to support said holder on the forward end ot the bar 25, and a hand-wheel 59 or equivalent means enables the operator to rotate the holder either continuously 'or step by step, as may be desired. Of' course a com'espondingly shaped master form B requires to be substituted for form A in order that the grinding wheels may be guided to properly contact with the surface ot the article being operated upon.

@ther modes of applying the principle of my invention may be employed instead of the one eXplained,-change being made as regards the mechanism herein disclosed, provided tie means stated by any ot the fol lowing claims or the equivalent of such stated means be employed.

l therefore particularly point out and distinctly claim as my invention: I I

1. ln a machine ot the character described, the combination with suitable base; ot two spindles mounted so as to be movable in unison towards and from each other and respectively provided with a polishing or grinding wheel; a pivoted worlz-holding member bodily movable in a iiXed plane between said spindles; means connected with said mem ber for shitting the same horizontally; means connected with said member for shifting the same vertically, said combined shifting means comprising the sole support of said member; and means adapted to vary the relative posit-ions ot said spindles in unison with the movement of said member.

In a machine of the character described, the combination with a suitable base; of two spindles mounted so as to be movable in unison towards and from each other and respectively provided with a polishing or grinding wheel; a pivoted work-holding member bodily movable in a iiXed plane between said spindles both parallel and transversely or the axes ot' said spindles; and a template carried by said member adapted to vary the relative positions ot said spindles as said member is moved.

8. In a machine of the character described, the combination with a` suitable base; of two spindles mounted so as to be movable in unison towards and from each other and respectively provided with a. polishing or grinding wheel.; a work-holding member pivoted for movement in a iXed plane between said spindles both parallel with and transversely of the axes of said spindles; a template carried by said member; and guides carried by said spindles and held in contact with. said template so to vary the relative positions of said spindles as said member is moved.

4l. ln a machine oit' the character described, the combination with a suitable base; of two spindles mounted so as to be movable in unison towards and from each other and respectively provided with a polishing or grinding wheel; a work-holding member pivoted for movement in a fixed plane between said spindles both parallel with and transversely oil the axes olif said spindles; a template carried by said member; and adjustable guides carried by said spindles and held in contact with said template so to Vary the relative posit-ions ot said spindles as said member is moved.

5. ln a machine of the character described, the combination with. a suitable base; of two spindles mounted so as to be movable in unison towards and from each other and respectively provided with a polishing or grinding wheel; a pivoted work-holding member bodily movable in iixed plane between said spindles both parallel with` and transversely of the axes of said spindles; and means adapted to move said member in each such direction independently oi the other, and conjo-intly connected to and supporting said member. y

6. ln a machine of the character described, the combination with a suitable base; oit two spindles mounted so as to be movable in unison towards and from each other and respectively provided with a polishing or grinding wheel;` a pivoted workholding member bodily movable in alixed porting said member.`

7.- n -a' machine ot' the character described, the combination with a suitable base; .of

two spindlesmounted so asto be movable in unison towards and 'from each other and respectively provided with a polishingor grinding wheel; a member disposed parallel with said spindles and adapted to support the article to be operated on between said wheels; cranks pivotal about axesl trans-I versely oi said spindles; and links connect# ing said ci'anks with said member, whereby the latter is I'iim'fable1 both up and down and longitudinally;

8; In a mach-ine of the character described, the'l combination `with a suitable base; of two' spindles'l mounted so as `tobe movable in uni# son towards andirom each other and re'- speetiv'ely provided with l polishing or grinding-wheel; a member disposed parallel with said spindles and adapted to support the article t'obe operated onbetween said wheels; interconnected bell-cranks pivotal abon't aires transversely oi' said spindles; links eonne'ctii'ig said bell-cranks with said member, whereby the latter is movable both np' and down and longitudinally; and means adapted to rock said bell-cranks.

'9'.'5 ln a' machine of the character described, the" combination with a suitable base; of two spindles mounted so as to be movable in unt son vtowards and from each other 4and' respectively provided with a polishing or grinding wheel; a' member disposed parallel with saidvsp'indles and adapted to support the article to be operated on between said wheels; interconnected bell-cranks pivotal about axes transversely of said spindles; links connecting said bell-cranks with `said member; means adapted to rock said bellcranks whereby said member is moved up and down; and other means connected with said member to move" the same longitudinally'. f v

l0. lin a machine oit the character described, the combination with a suitable base; oi two spindles mounted so as to be movable in unison towards and iromeach other and respectively providedy with a polishing orl grinding wheel; a member disposed parallel with said spindles and adapt-I ed to support the article to be operated on between said wheels; interconnected bellcrai'iks pivotal about axes transversely of said spindles; links connecting said bell cranks with said member; means adapted to rock said bell-cranks whereby said member is inoved'up and down; and other means con-v nected withV said member to move the same;-

longitufdinally,said last named means operA ating more frequentlythan those firstnamed'.,

1l. In a machine of the character ,der

scribed, the combination with a suitable base; of two arms oscillatorily supportedl thereon about spaced parallel axes; aspindle mounted oneach inch arm adapted to re-` ceive a polishing or grinding wheel; means; tending to actuate saidarms to move said spindles, and thus said wheels, towardsy each other; a work-holding' member movable: in a' fixed plane between said spindles b oth paaL lel therewith and transversely 'of such axesgf' and-means controlling the action of said aim-actuating means in unison with the movement ot said member.

`l2.I In a machineof the' character described, theH combination with a suitable base; of two arms oseillatorily supported thereon about spaced parallelj axes; aspiridle mounted on each such arm adapted toreceive a polishing or grinding wheel; means.

tending to actuate said arms to move said spindles, and thus sai-d wheels, towards each other; a work-holding memberr movable in a tixed plane between said spindles both par-f.y

ceive a polishing" or grinding wheel;- means tending toaetuate saidrarms to move said spindles, and thus said wlreels;y towards each" other; awork-holding 'membermovable ina i'iied plane between said spindles both par allel rtherewith and transversely',l of such axes; a template .carried by said 'membem and guides carried 4by said arms and serv4 ing by contact 'with said template to control the action of said arm-actuating means in unison with the movement of said mem: ben

14. In a machine of the character deF` scribed, the combinationy with suitable base; of two' arms' oscillatorily supported thereon about spaced parallel axes; a spin'- dle mounted on each such arm adapted to re; ceive a polishing or grinding wheel; means tending` to actuate said arms to-mo've said spindles, and thus said wheels, towz'irdeaeli other; a work-holding member movable in izo a tixed plane between said spindles both parv allel therewith and transversely of lsuoli axes; a template carried by said member; and guides in the form' of plates trans-y versely adjustably secured to said arms and serving by Contact with said template to control the action of said arm-actuating-means iso ifi/.mese

in unison with the movement of said memH ber.

15. In a machine of the character described, the combination with a suitable base; of two arms oscillatorily supported thereon about spaced parallel axes; a spindle mounted on each such arm adapted to receive a polishing or grinding wheel; means tending to actuate said arms to move said spindles, and thus said wheels, towards each other; a work-holding member movable in a fixed plane between said spindles both parallel therewith and transversely of such axes; a template carried by said member; and guides in the form ot plates oscillatorily secured to said arms about axes parallel with the axes of the latter, said guides havingcurved faces adapted by contact with said template to control the action of said arm-actuating means in unison with the movement of said member.

16.1n a machine oit' the character de scribed, the combination with a suitable base; of two spindles mounted so as to be movable in unison towards and from each other and respectively provided with a polishing or grinding wheel; and a work-holding member bodily movable in a iiXed plane between said spindles, vsaid member being also rotatable about an axis lying in suoli 9 plane.

17. In a machine of the character described, the combination with a suitable base; of two spindles mounted so as to be movable in unison towards and from each other and respectively provided with a polishing or grinding wheel; and a work-holding member bodily movable in a fixed plane between said spindles both parallel with and transversely of the axes of said spindles, said member being also rotatable about an axis lying in such plane.

18. In a machine of the character described, the combination with a suitable base; of two spindles mounted so as to be movable in unison towards and from each other and respectively provided with a polishing or grinding wheel; and a work-holding member bodily movable in a Xed plane between said spindles both parallel with and transversely of the axes of said spindles, said member being also rotatable about an axis lyingin such plane and parallel with one such direction of movement.

Signed by me, this th day of November, 1919.

CHARLIE L. HAWES. 

